High speed steel rolls
High-speed steel rolls, produced by the horizontal centrifugal casting process, are all complound rolls with high-speed steel as the work layer and nodular iron as the core. The material of HSS contains plenty of alloyed elements such as Mo, V, W, Cr, etc. The highly hardened electric carbides & second carbides, such as MC, M2C, and M6C evenly distributed in tempered martensitic matrix, make the wear and thermal cracking resistance very excellent. Besides, the resistance to surface roughing is also good. In the condition of hot rolling, the contact points between the steel strip and the work rolls can form a thin adherent oxide film on the roll surface, which plays a good role in the wear features and the quality of the strip surface.
